320135773 has 2 divisors, whose sum is σ = 320135774. Its totient is φ = 320135772.

The previous prime is 320135771. The next prime is 320135779. The reversal of 320135773 is 377531023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319801689 + 334084 = 17883^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 320135773 - 2¹ = 320135771 is a prime.

Together with 320135771, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320135771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160067886 + 160067887.

It is an arithmetic number, because the mean of its divisors is an integer number (160067887).

Almost surely, 2^320135773 is an apocalyptic number.

It is an amenable number.

320135773 is a deficient number, since it is larger than the sum of its proper divisors (1).

320135773 is an equidigital number, since it uses as much as digits as its factorization.

320135773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 31.

The square root of 320135773 is about 17892.3383882599. The cubic root of 320135773 is about 684.0871018941.

Adding to 320135773 its reverse (377531023), we get a palindrome (697666796).

The spelling of 320135773 in words is "three hundred twenty million, one hundred thirty-five thousand, seven hundred seventy-three".